Mobile device charger



FIG. 1 is a top perspective view of a mobile device charger.

FIG. 2 is a top plan view thereof.

FIG. 3 is a front side elevational view thereof; and,

FIG. 4 is a right side elevational view thereof, the left side elevational view being identical thereto.

Any features shown in dotted, dashed, and/or broken lines do not form part of the claimed design. Any surface shading is used solely to show the character and/or contour of the surface represented. 

CLAIM What is claimed is the ornamental design for a mobile device charger, as shown and described. 